INTERNATIONAL TELECOMMUNICATION UNION ITU-T RECOMMENDATION SUMMARY Rec. No. : I.233 Title : Frame mode bearer services Study Group : XVIII - ISDN Version : New Date of adoption : 1991 Notes : Recommendation I.210 describes the principles for defining telecommunication services supported by an ISDN including the concept of bearer services, teleservices and supplementary services. It also provides the means for the definition and description of such services. A recommended set of bearer service categories is defined in Recommendation I.230. The purpose of Recommendation I.233 is to describe a recommended set of frame mode bearer services (FMBS), to describe individual frame mode bearer services and to recommend their provision in an ISDN. To order the complete text of this Recommendation, please use the Order Form for ITU-T Recommendations. An electronic version of this form is available on ITUDOC (Winword 2.0: UPI=ITU-5265; ASCII: UPI=ITU-2488).